title: Studies of bio-mimetic medium of ionic and non-ionic micelles by a simple charge transfer fluorescence probe N,N-dimethylaminonapthyl-(acrylo)-nitrile.
abstract: In this report we have studied micellization process of anionic, cationic and non-ionic surfactants using N,N-dimethylaminonapthyl-(acrylo)-nitrile (DMANAN) as an external fluorescence probe. Micropolarity, microviscosity, critical micellar concentration of these micelles based on steady state absorption and fluorescence and time resolved emission spectroscopy of the probe DMANAN show that the molecule resides in the micelle-water interface for ionic micelles and in the core for the non-ionic micelle. The effect of variation of pH of the micellar solution as well as fluorescence quenching measurements of DMANAN provide further support for the location of the probe in the micelles.
authors.affiliation: Department of Chemistry, University of Calcutta, Kolkata, West Bengal, India.
authors.forename: Anuva
authors.initials: A
authors.lastname: Samanta
authors.forename: Bijan Kumar
authors.initials: BK
authors.lastname: Paul
authors.forename: N
authors.initials: N
authors.lastname: Guchhait
mesh_terms: D015057:1-Naphthylamine / Q000031:analogs & derivatives* / Q000737:chemistry; D000042:Absorption; D016880:Anisotropy; D040761:Biomimetic Materials / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D007477:Ions; D008823:Micelles; D009570:Nitriles / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013464:Sulfuric Acids / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry; D013696:Temperature; D014783:Viscosity
chemical_list: D002593:Cetrimonium Compounds; D005456:Fluorescent Dyes; D007477:Ions; D008823:Micelles; C559461:N,N-dimethylaminonapthyl-(acrylo)-nitrile; D009570:Nitriles; D012996:Solutions; D013464:Sulfuric Acids; D013501:Surface-Active Agents; D015057:1-Naphthylamine; C033158:sulfuric acid; D000077286:Cetrimonium